Because only women have the required body parts.
There is increase in libido. also onset of menstruation.
Girls
Menstruation
No, girls don't need to have menstruated to get pregnant. Ovulation occurs BEFORE menstruation so you can get pregnant before menstruation.
No, menstruation occurs in individuals who have a uterus and typically identifies as female. Men do not experience menstruation.
When the uterine lining sheds this is typically called menstruation. Although women on hormonal birth control will experience a faux period in the form of a withdrawal bleed.
No, menstruation cannot contrinue during pregnancy. Menstruation will only occur if the egg during ovulation is not fertilised. You cannot menstruate while pregnant, although you can bleed for a few reasons so if you do experience bleeding during menstruation you should see your doctor.
Mensturation has nothing to do with virginity.
Only females are affected by monthly menstruation.
It is 12.
Ovulation does occur before menarche. Menarche is the term used to describe a girls first period, menstruation will only occur if the woman ovulates. With that said some people will experience vaginal bleeding as a result of hormonal imbalance which will look like menstruation but without ovulation occurring beforehand, and sometimes we call that menarche - because we've no way of knowing if ovulation had occurred.
Girls wear white shorts to openly express that they are through their menstruation cycle of that precise month. Basically, they can only wear white shorts for three week per month.